Electrical safety inspection (VBF) is required per 40/2017 NGM regulation (VMBSZ 1.13). This is NOT the same as lightning protection inspection, which falls under OTSZ.
VBF frequency (VMBSZ 1.13 typical): - General inspection: every 3 years (elevated risk) or 6 years (normal use) - Upon rental, ownership change - After modifications or extensions